Beta-lactam Side Effects and Warnings

Possible side effects include:

• Allergic reactions, such as rash, itchy skin, difficulty breathing—Get help if any of these occurs. For breathing difficulties, get emergency care.
• Diarrhea —This may be severe; in which case, call your doctor.
• Nausea, vomiting, stomach upset
• Decreased effectiveness of oral contraceptives—Use another form of contraception while you are taking these medications.
• Bleeding problems—Check with your doctor if you notice easy bruising, increased bleeding, or spontaneous bleeding.